Means for cooling dynamo-electric machines.



H. ROOS. MEANS FOR COOLING DYNAMO ELECTRIC MAGHINES.

APPLICATION FILED NOV. 23, 1909.

957,103. Patented May 3,1910.

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fan/Z j g Her'mafi R005,

ANDREW & coma moraumooumms. WASHINGTON, n. c

- STATES.

PATENT HERMAi T RODS, 0F BERLIN, GERMANY, ASSIGNOR T0 GENERAL ELECTRIC} COMPANY, A CORPORATION OF NEW YORK.

MEANS FOR COOLING DYNAMO-ELECTRIC MACHINES.

Original application filed October 18, 1907, Serial No. 398,029.

Serial No. 529,566,

To all whom it may concern:

Be it known that I, HERMAFI Boos, a subject of the Emperor of Germany, residing at Berlin, Germany, have invented certain new and usetulz Improvements in Means for Cooling Dynamo-Electric Machines, of which the following is a specification.

My invention relates to dynamo-electric machines and has for its object to provide improved cooling means for such machines, whereby the heat generated. during their operation may be carried away in a quick and effective manner. The cooling of high speed generators, such as turbine driven machines, presents great difficulties, since the radiating surface is small in proportion to the losses which must be dissipated.

To the above end my invention consists in certain. novel featuresof construction, which will be pointed out with particularity in the claims appended to and forming a part of this specification For a better understanding oi my invention reference may be had to the following detailed description taken in connection with the accompanying drawing, in which Figure 1 is the cross-section of a dynamoelectric machine embodying my invention; Fig. 2 is a vertical section of the machine shown in Fig. 1 on the line 22, and Fig. 3 is a similar sect-ion on the line 3-3.

Referring to the drawing, the laminations are divided into bundles separated by radial inlet and outlet ventilating spaces 2 and 2'. These ventilating spaces are connected together by the axial channels 3 formed in the bundles of laminations.

5, 5 are coils of the stator windings, and 6 the cast iron casing of the stator.

Although the axial channels 3 are shown in the drawing in their most advantageous position, namely, as near as possible to the lnner periphery of the laminations where the greatest heating takes place, it would, of course, only be a special embodiment of my invention to put the axial channels more toward the outer periphery of the lamina tions. Likewise, it is not absolutely necessary to form the channels 3 in a circle about theinner periphery of the laminations, but these may be distributed in any desired arrangement. I

Specification of Letters Patent.

Patented May 3, 1910.

Divided and this application filed November All of the inlet spaces 2&16 connected with a common inlet chamber 9 formed in the casing, and all the exit spaces 2 with a common outlet chamber 10, also formed in the casing. The latter chamber opens into. the funnel 8. It is necessary to separate the inlet chamber 9. together with the inlet air, or ventilating spaces 2 connected therewith, from the outlet chamber 10, and the exit spaces 2' by means ofa suitable arrangement of the spacing or separating blocks 4. This consists in arranging the blocks 4 for the inlet spaces 2 1n the upper half, and: for the exit spaces 2 in the lower half of the outer periphery. The inner periphery of the inlet air spaces 2 are closed by separating blocks 4:. These blocks are connected to. axially directed ribs 12 preferably formed onthe casing so that the desired separation of the inlet chamber 9 from the outlet chamber 10 is secured.

As seen in Fig. 1, the exit spaces 2 may remain partially 0 en to the air gap between, the stator an rotor so that the cooling air flowing in the air gap between the stator and rotor finds an. outlet through the exit spaces 2. An arrangement like this latter one increases the ventilation, as both the air from the air gap and the channels 3 tends to flow away from the rotor. The cooling air is drawn from the exterior of the machine into entrance chambers 12 situated at both ends of the machine, by fans 11 and driven against the coils, from there to the inlet chamber 9, thence through the inlet spaces 2, through the axial channels 3, through the exit spaces 2' and into the exit chamber 10, passing from there through the funnel 8 into the open air. In the arrangement shown in the drawing, it is not necessary to separate the channels 8 from each other but they may be carried through all the bundles of laminations in communication with each other.

The terms stator and rotor are used throughout this specification in their broad sense of stationary and rotary members.

This application is a division of In prior application Serial No. 398,029, filed ctober 18, 1907.

I desire it to be understood that my invention is not limited to the articular construction shown and describe and I aim in the appended claims to cover all modifications which do not depart from the spirit of my invention.

hat I claim as new and desire to secure by Letters Patent of the United States, is,

1. In a dynamo-electric machine, a rotary member, a stationary laminated core body having radial inlet and outlet ventilating spaces, axial channels connecting the spaces so arranged that cooling air flows into the inlet spaces, through the axial channels and out through the outlet spaces, and separating blocks to close the inlet spaces and partially close the outlet spaces from said rotary member.

2. In a dynamo-electric machine, a casing having inlet and outlet chambers, a stationary laminated core body having radial inlet and outlet ventilating spaces and axial channels connecting the spaces, and separating blocks to close the inlet spaces and partially close the outlet spaces on the inner periphery of the core body, and also to close the inlet spaces against the outlet chamber and the outlet spaces against the inlet chamber, said inlet spaces communicating with said inlet chamber, and said outlet spaces with said outlet chamber.

3. In a dynamo-electric machine, a casing having inlet and outlet chambers, a stationary laminated core body having radial inlet and outlet ventilating spaces and axial channels connecting the spaces, and separating blocks to close the inlet spaces and partially close the outlet spaces on the inner periphery of the core body, and also to close the inlet spaces against the outlet chamber and the outlet spaces against the inlet chamber, said inlet spaces communicating with said inlet chamber throughout a portion only of the outer periphery of the core body and said outlet spaces with said outlet chamber throughout a portion only of the outer periphery of the core body.

4. In a dynamo-electric machine, a rotary member, fans secured to both ends of said rotary member, a casing having entrance chambers at both ends tor the admission of air and inlet and outlet chambers, said entrance chamber communicating with said inlet chamber or chambers, a funnel communicating with said outlet chamber or chambers, a stationary laminated core body having radial inlet and outlet ventilating spaces and axial channels connecting the spaces, and separating blocks to close the inlet spaces and partially close the outlet spaces on the inner periphery of the core body and also to close the inlet spaces against the outlet chamber and the outlet spaces against the inlet chamber, said inlet spaces communicating with said inlet chamber throughout a portion only of the outer periphery of the core body and said outlet spaces with said outlet chamber throughout a portion only of the outer periphery of the core body.

5. In a dynamo-electric machine, a rotary member, a stationary laminated core body having radial inlet and outlet ventilating spaces and aXial channels connecting the spaces, and separating blocks to close the inlet spaces and partially close the outle spaces from said rotary member.

In witness whereof, I have hereunto set my hand this fourth day of Novgmber, 1909.

HERMAN ROOS.

Witnesses:

KARL SULsBnReER, Trmonon SAHRIG. 

